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Filed March 21. 1958 v J6 j 40 Z7 a 55 75 W. w. Goon CHAIR y 2 sheets-sheet 1 M lgllllum!! L gli 7 i7/5 Z4INVENTOR.

2756 505.53735 W ne/ 60a jill-71j BY ATTORNEY w. w. Goon I 2,935,121

May 3, 1960 CHAIR Filed March 21, 1958 2 Sheets-Sheet 2 INV ENTOR. Wag/7e M6000/ ATTORNEY CHAIR Wayne W. Good, Sturgis, Mich., assignor to Harter Corporation, Sturgis, Mich., a corporation of Michigan Application March 21, 1958, Serial No. 723,012

5 Claims. (Cl. 155-95) This invention relates to chairs commonly designated as oiiice type.

The main objects of this invention are: First, to provide a swivel chair assembly including a base which is fabricated mainly of tubular stock and while base structure.

Fourth, to provide a chair having these several advantages in which the par-ts may be packaged and shipped in the knock down and readily assembled.

Fifth, to provide a chair structure having these advantages in which the parts may be economically produced.

Objects relating to details and economies of the invention will appear from the description to follow. The invention is defined and pointed out in the claims.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in which:

Fig. 1 is a side elevational view of a swivel chair em- I bodying my invention.

Fig. 2 is a fragmentary rear elevational view thereof. Fig. 3 is an inverted view of the chair seat, back and arms assembly with the supporting post in cross section. Fig. 4 is a perspective View of the seat, back and arm supporting frame.

`the frame.

Fig. 9 is a fragmentary view partially in horizontal section on a line corresponding to line 9-9 of Fig. 10 showing details ofthe base or pedestal.

Fig. l is a fragmentary View lpartially in vertical section on a line corresponding to line 10--10 of Fig. 9.

Fig. 1l is a perspective view of the central body member of the base.

The base or pedestal unit comprises the vertically disposed cylindrical body member 1 which is provided with vertically elongated angularly spaced holes 2. The legs 3 of tubular stock are attened in cross section to t within the openings 2 and are disposed therein and lixedly secured to the body member as by welds 4. The legs taper outwardly and are provided with nonmetallic buffers 5 at their outer ends and with caster wheels 6. The details of mounting the caster wheels and buffers ,c Unite States Patent 2,935,121` Patented May 3, 196i) are not illustrated as they form no part of this present mvention.

The tubular post socket 7 is disposed centrally within the body member 1 and fXedly secured to and supported therein by the vertically spaced upper and lower conical support members 8 and 9. The upper member 8 is disposed above and the member 9 is disposed below the leg openings. These support Vmembers have downturned anges 1t) which are xedly secured to the inner side of the body member as by welds, indicated at 11, see Fig. 10. The post socket projects above the upper support member 8 and has an annular rib-likeo'set 13 therein which supportedly engages the upper support member 8. The socket projects substantially above the upper support member 8 and is provided with an outturned bear ing ange 14 at its upper end. The chair post 15 -is rotatably and adjustably supported within the socket by means of the nut 16 which has an outturned bearing flange 17 coacting with the bearing on the upper end of the post socket, an anti-friction element 20 being disposed between the bearings. This element 20 may desirably be a washer-like piece of nylon or the like and embraces the post so that it cannot slip laterally out of position.

The nut is provided with a skirt-like housing 21 which rotatably embraces the upper end of the body member 1 and constitutes a lateral support for the post 7, see Fig. 10. This housing is desirably provided with laterally projecting hand pieces 22 facilitating adjustment of the nut. A retaining screw 23 is threaded through the housing with its inner end projecting below the liange-like bearing 14 of the socket member.

The back supporting unit designated generally by the numeral 24 is mounted upon the upper end of the post. As usable back supporting units are commercially available and form no part of my present invention other than as a back support, I have not illustrated the details of the unit but it will be understood that the supporting posts or uprights 25 for the back 26 are swingably supported by this unit 24, the uprights being provided with a cross piece 27 at their lower ends which is mounted for vertical adjustment on the back supporting unit 24.

The combined seat, back and arm supporting frame of my invention is illustrated in Fig. 4 and comprises the side members 28 disposed transversely of the chair, desirably formed of tubing and are disposed in laterally spaced relation. These side members have upturned upwardly converging end portions 29. The side members 28 are rigidly connected by the outer pair of cross pieces 30 and the intermediate pair of cross pieces 31. These cross pieces are of angled section, the outer cross pieces being disposed with their angles facing inwardly and downwardly and the intermediate cross pieces being disposed -with their angles facing upwardly and outwardly. The cross pieces are disposed between the side members in end abutting relation thereto and xedly secured thereto as by welds indicatedat 32.

The cross pieces 30 have longitudinally spaced holes 33 in their horizontal arms and the cross pieces 31 have holes 34 in their horizontal arms. The arm supporting bars 35 are provided with downwardly projecting and downwardly diverging tubular uprights 36 aligned with and telescopingly engaging the upturned ends 29 of the side bars and xedly secured thereto. The bars 35 are provided withlongitudinally spaced holes 46 receiving the attaching screws 37 for securing the arms 38 to the bars 35. The arms 38 areformed as units and in assembling are merely positioned upon and secured to the bars 35. The seat 39 is disposed upon the supporting frame and secured thereto by means of bolts 40 which-project downwardly from the seat and are spaced to engage the holes 33 in the cross pieces 34) of the frame, see Fig. 7.

The back supporting unit 24 is disposed on the underif desired, may be shipped or stored disassembled and readily assembled for display or delivery. The structure also permits a wide variation in upholstery, both in the matter of materials and colors, and substantial variations in design details.

I have illustrated and described my invention in a highly practical embodiment thereof. I have not attempted to illustrate or describe other modiiications or adaptations as it is believed this disclosure will enable those skilled in the art to embody or produce the s-tructure as may be desired.

Having thus described the invention, what is claimed as new and is desired to be secured by Letters Patent is:

1. A swivel chair base assembly comprising a vertically disposed cylindrical body member provided with angularly spaced vertically elongated leg openings, outwardly tapering tubular legs having inner end portions cross sectionally shaped to correspond to said openings fttingly disposed therein and iixedly secured to said body member to project radially therefrom, upper and lower socket support members having central `openings therein disposed within said body member and iixedly secured thereto one above and the other below said leg openings therein, a tubular post socket disposed through and tixedly secured to said supports to project upwardly therefrom, said socket having an outwardly projecting flange like lbearing member yat its upper end, a post supporting nut having an outwardly projecting flange rotatably supported on said socket bearing member, said nut being provided with a housing member rotatably embracing the upper end of said body member and provided with a hand piece facilitating adjustment of the nut relative to a threaded chair post disposed within #and laterally supported by said post socket, and a nut retaining member having threaded engagement with the housing member and disposed below and coacting with said flange on said socket member to releasably retain the post supporting nut and the post carried thereby.

2. A swivel chair base assembly comprising a vertically disposed tubular body member provided with angularly spaced leg openings, legs having inner end portions fittingly disposed in said openings and xedly secured to said body member to project radially therefrom, vertically spaced socket support members disposed within said body member and iixedly secured thereto, a tubular post socket disposed through and xedly secured to said support members to project upwardly therefrom, said post socket having an outwardly offset above the upper of said socket supports disposed in thrust supported engagement therewith, said socket having an outwardly projecting ange like bearing member at its upper end, and a post supporting nut having an annular flange rotatably supported on said socket bearing member, said nut being provided with a housing member rotatably embracing the upper end of said body member and provided with a hand piece facilitating adjustment of the nut relative to a threaded chair post disposed within and laterally supported by said post socket, said nut being provided with a retaining member having threaded engagement with the housing member and disposed below and coacting with said flange on said socket member t0 releasably retain the post supporting nut and the post carried thereby upon the base.

assenza a 3. A base hub unit for a swivel chair comprising a vertically disposed cylindrical body member having -angularly spaced leg receiving openings therein, conical upper and lower post socket support members having central post socket openings therein disposed one above the other below said leg openings in said body member and having downturned peripheral anges fitting within and iixedly secured to said body member, a tubular post socket member littingly disposed in said openings and iixedly secured to said support members, said post socket member having an annular rib like offset therein supportedly engaging the upper support member and having an outturned bearing ange at its upper end spaced upwardly from said otset, a post supporting nut having a bearing rotatably supported on saidibearing flange of said socket member, a chambered bearing member housing xedly connected to said nut and rotatably iitting the upper ends of said body member, and a retaining member for said housing having threaded engagement with and releasably engageable with the underside of said bearing flange on said socket member.

4. A base hub unit for a swivel chair comprising a `vertically disposed cylindrical body member having angularly spaced leg receiving openings therein, upper and lower post socket support members having central post socket openings therein disposed one above the other below said leg openings in said body member and iixedly secured to said body member, a tubular post socket member disposed through said openings and iixedly secured to -said support members, said post socket member having a bearing at its upper end, a post supporting nut having a bearing rotatably supported on said bearing of said socket member, a chambered bearing member housing lixedly connected to said nut and rotatably fitting the upper ends of said body member, and a retaining member for said housing having threaded engagement with and releasably engageable with the under side of said bearing ange on said socket member.

5. A base hub unit for a swivel chair comprising a vertically disposed cylindrical body member having angularly spaced leg receiving openings therein, conical upper and lower post socket support members having central post socket openings therein disposed one yabove the other below said leg openings in said body member and having downturned peripheral =flanges fitting within and tixedly secured to said body member, a tubular post socket member tittingly disposed in said openings and iixedly secured to said support members, said post socket member having an annular rib like offset therein supportedly engaging the upper support member and having an outturned bearing ilange at its upper end spaced upwardly from said offset, a post supporting nut having a bearing rotatably supported on said bearing ange of said socket member.

References Cited in the tile of this patent UNITED STATES PATENTS 1,182,889 Bolens May 16, 1916 1,872,894 Collier et al. Aug. 23, 1932 1,873,054 Sheldrick Aug. 23, 1932 2,587,886 Penchoen Mar. 4, 1952 2,702,075 Richards Feb. 15, 1955 2,704,113 McKinley Mar. 15, 1955 2,800,171 Hoven et al July 23, 1957 2,806,515 Burst Sept. 17, 1957 y t FOREIGN PATENTS 313,705 Great Britain June 20, 1929 

